1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
D D
C C
B B
A A
Title
Number RevisionSize
A3
Date: 2022/4/7 Sheet of
File: I:\办公2022\冰箱4.6\原理图\Sheet1.SchDocDrawn By:
P1.0
1
P1.1
2
P1.2
3
P1.3
4
P1.4
5
P1.5
6
P1.6
7
P1.7
8
RST
9
P3.0/RXD
10
P3.1/TXD
11
P3.2/INT0
12
P3.3/INT1
13
P3.4/T0
14
P3.5/T1
15
P3.6/WR
16
P3.7/RD
17
XTAL2
18
XTAL1
19
GND
20
P2.0
21
P2.1
22
P2.2
23
P2.3
24
P2.4
25
P2.5
26
P2.6
27
P2.7
28
PSEN
29
ALE/PROG
30
EA
31
P0.7
32
P0.6
33
P0.5
34
P0.4
35
P0.3
36
P0.2
37
P0.1
38
P0.0
39
VCC
40
U1
80511 2
Y1
XTAL
30pF
C2
Cap
10uF
C1
Cap Pol1
30pF
C3
Cap
10K
R1
Res2
GND
VCC
15
A
14
D7
13
D6
12
D5
11
D4
10
D3
9
D2
8
D1
7
D0
6
E
5
RW
4
RS
3
V0
2
VCC
1
GND
16
K
LCD1602
LCD1
1
2
3
4
5
6
7
8
9
RP1
RESP
S1
SW-PB
Q1
PNP
LS1
Speaker
D2
LED3
GND
VCC
GND
10K
R3
Res2
S2
SW-PB
S3
SW-PB
S4
SW-PB
S5
SW-PB
S6
SW-PB
S7
SW-PB
S8
SW-PB
P30
P31
P32
P33
P34
P35
P36
P37
P10
P11
P12
P13
P14
P15
P16
P17
Vin Vout
GND
7805
Volt Reg
0.1uF
C5
Cap
100uF
C4
Cap Pol1
0.1uF
C7
Cap
100uF
C6
Cap Pol1
1
2
P1
电源接口
GND
VCC
1K
R2
RPot
VCC
S?
SW-SPST
GND
P27
P26
P25
P24
P23
P22
P15
P16
P17
P30
P31
P32
P33
P22
P23
WP
7
SDA
5
SCK
6
A2
3
A1
2
A0
1
GND
4
VCC
8
U2
24C02C
GND
VCC
P13
P14
AIN0
1
AIN1
2
AIN2
3
A0
5
SDA
9
SCL
10
AIN3
4
AOUT
15
VREF
14
EXT
12
A2
7
A1
6
AGND
13
OSC
11
U4
PCF8591
1
2
P2
电压输入
GND
GND
VCC
GND
P13
P14
X1
2
VCC1
8
VCC2
1
RST
5
SCLK
7
I/O
6
X2
3
GND
4
U3
DS1302
BT?
Battery
1 2
Y2
XTAL
GND
VCC
P10
P11
P12
SH_CP
11
DS
14
ST_CP
12
MR
10
OE
13
Q0
15
Q1
1
Q2
2
Q3
3
Q4
4
Q5
5
Q6
6
Q7
7
Q7‘
9
U5
74595
10K
R5
Res2
D3
LED3
10K
R6
Res2
D4
LED3
10K
R7
Res2
D5
LED3
10K
R8
Res2
D6
LED3
10K
R9
Res2
D7
LED3
10K
R10
Res2
VCC
D1
LED3
10K
R4
Res2
VCC
P30
GND
VCC
P35
P36
P37
VDD
1
DATA
2
GND
4
> 80
27
U6
DHT11
GND
VCC
P24
Q2
PNP
M
B1
Motor
1
2
3
4
5
K1
Relay
GND
VCC
10K
R11
Res2
P25
Q4
PNP
M
B2
Motor
1
2
3
4
5
K2
Relay
GND
VCC
10K
R12
Res2
P25
Q3
PNP
1
2
3
4
5
K3
Relay
GND
VCC
10K
R13
Res2
P26
Q5
PNP
M
B3
Motor
1
2
3
4
5
K4
Relay
GND
VCC
10K
R14
Res2
P27
DS1
Lamp